How to use Java to achieve the effect of outputting age groups according to age values

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Title:

  According to age, print out the current age of the person is juvenile (under 18), youth (19-28), middle age (29-55), old age (56 +)

Java code implementation

import java.util.Scanner;

public static void main0(String[] args) {

Scanner scan = new Scanner(System.in);

System.out.print("Please enter the age of this person: ");

int age = scan.nextInt();

if(age>=0 && age=19 && age=29 && age=56){

System.out.println("old");

}

}

  We enter a numerical value, and the program prints out the age range.

Second, print 1-100 prime numbers

Title:

  Prints prime numbers between 1 and 100

Java code implementation

public static void main(String[] args) {

int i=1;

int j=2;

int count=0;

for(i=1;i